atmosphere_frag_shader = shader.FragmentShader(
'atmosphere', shader_noise_glsl + '''
/* Animated atmospheric shader */
uniform float time;
varying vec3 position;
varying vec3 normal;
varying vec3 lightvec;
varying vec4 color;
void main(void) {
float t = fbmnoise(gl_TexCoord[1].xyz * 2.0 + time * 0.003, 6);
vec3 turb = vec3(sin(t*t), cos(t+t), 0) * 0.025;
float h = fbmnoise(turb + position, 6) + 1.0;
h = h*h*h*h * 0.15;
if (h > 0.0) {
/* Calculate the lighting */
vec3 N = normalize(normal);
float intensity = max(0.0, dot(N, normalize(lightvec)));
float glare = max(0.0, dot(N, normalize(gl_LightSource[0].halfVector.xyz)));
vec4 ambient = gl_LightSource[0].ambient;
vec4 diffuse = gl_LightSource[0].diffuse * intensity;
vec4 specular = gl_LightSource[0].specular * pow(glare, 64.0);
gl_FragColor = (ambient + diffuse + specular) * color * h;
} else {
discard;
}
}
''')
atmosphere_prog = shader.ShaderProgram(vert_shader, atmosphere_frag_shader)
lightvec = gl_LightSource[0].position.xyz - v.xyz;
color = gl_Color;
}
''')
smooth_frag_shader = shader.FragmentShader('smooth', '''
/* Simple per-pixel lighting shader */
uniform float height;
varying vec3 position;
varying vec3 normal;
varying vec3 lightvec;
varying vec4 color;
void main(void) {
vec3 N = normalize(normal);
/* Calculate the lighting */
float intensity = max(0.0, dot(N, normalize(lightvec)));
float glare = max(0.0, dot(N, normalize(gl_LightSource[0].halfVector.xyz)));
vec4 ambient = gl_LightSource[0].ambient;
vec4 diffuse = gl_LightSource[0].diffuse * intensity;
vec4 specular = gl_LightSource[0].specular * pow(glare, 128.0);
gl_FragColor = (ambient + diffuse + specular) * color;
}
''')
smooth_prog = shader.ShaderProgram(vert_shader, smooth_frag_shader)
simple_bump_frag_shader = shader.FragmentShader('simple_bump', shader_noise_glsl + '''
/* Simple normal mapper using perlin noise */
color = gl_Color;
}
''')
atmosphere_frag_shader = shader.FragmentShader(
'atmosphere', shader_noise_glsl + '''
/* Animated atmospheric shader */
uniform float time;
varying vec3 position;
varying vec3 normal;
varying vec3 lightvec;
varying vec4 color;
void main(void) {
float t = fbmnoise(position * 2.0 + time * 0.001, 2);
vec3 turb = vec3(sin(t * 0.5), cos(t), 0) * 0.04;
float h = fbmturbulence(turb + position * 0.5 + time * 0.002, 6) * 1.35;
h = h*h;
/* Calculate the lighting */
vec3 N = normalize(normal);
float intensity = max(0.0, dot(N, normalize(lightvec)));
float glare = max(0.0, dot(N, normalize(gl_LightSource[0].halfVector.xyz)));
vec4 ambient = gl_LightSource[0].ambient;
vec4 diffuse = gl_LightSource[0].diffuse * intensity;
vec4 specular = gl_LightSource[0].specular * pow(glare, 64.0);
gl_FragColor = (ambient + diffuse + specular) * color * h;
}
''')
atmosphere_prog = shader.ShaderProgram(vert_shader, atmosphere_frag_shader)
atmosphere_prog.install()
atmosphere_prog.uset1F('scale', 0.3)